APA

Hitchcock A. S., Swallen J. R. & Chase A. (1939). Poales. New York, New York, United States: The New York Botanical Garden.

Chicago

Hitchcock Albert Spear, Swallen Jason Richard and Chase Agnes. 1939. Poales. New York, New York, United States: The New York Botanical Garden.

Harvard

Hitchcock A. S., Swallen J. R. and Chase A. (1939). Poales. New York, New York, United States: The New York Botanical Garden.

MLA

Hitchcock Albert Spear, Swallen Jason Richard and Chase Agnes. Poales. New York, New York, United States: The New York Botanical Garden. 1939.